com.weibo.api.motan.core

Class StandardThreadExecutor

java.lang.Object

java.util.concurrent.AbstractExecutorService

java.util.concurrent.ThreadPoolExecutor

com.weibo.api.motan.core.StandardThreadExecutor

All Implemented Interfaces:

Executor, ExecutorService

public class StandardThreadExecutor
extends ThreadPoolExecutor

 
 代码和思路主要来自于：
 
 tomcat : 
                org.apache.catalina.core.StandardThreadExecutor
 
 java.util.concurrent
 threadPoolExecutor execute执行策略：                优先offer到queue，queue满后再扩充线程到maxThread，如果已经到了maxThread就reject 
                                                                比较适合于CPU密集型应用（比如runnable内部执行的操作都在JVM内部，memory copy, or compute等等）
 
 StandardThreadExecutor execute执行策略：    优先扩充线程到maxThread，再offer到queue，如果满了就reject 
                                                        比较适合于业务处理需要远程资源的场景
 
 

Version:

创建时间：2013-6-20

Author:

maijunsheng

Nested Class Summary

Nested classes/interfaces inherited from class java.util.concurrent.ThreadPoolExecutor

ThreadPoolExecutor.AbortPolicy, ThreadPoolExecutor.CallerRunsPolicy, ThreadPoolExecutor.DiscardOldestPolicy, ThreadPoolExecutor.DiscardPolicy

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_MAX_IDLE_TIME
static int	DEFAULT_MAX_THREADS
static int	DEFAULT_MIN_THREADS
protected AtomicInteger	submittedTasksCount

Constructor Summary

Constructors

Constructor and Description
StandardThreadExecutor()
StandardThreadExecutor(int coreThread, int maxThreads)
StandardThreadExecutor(int coreThreads, int maxThreads, int queueCapacity)
StandardThreadExecutor(int coreThreads, int maxThreads, int queueCapacity, ThreadFactory threadFactory)
StandardThreadExecutor(int coreThread, int maxThreads, long keepAliveTime, TimeUnit unit)
StandardThreadExecutor(int coreThreads, int maxThreads, long keepAliveTime, TimeUnit unit, int queueCapacity)
StandardThreadExecutor(int coreThreads, int maxThreads, long keepAliveTime, TimeUnit unit, int queueCapacity, ThreadFactory threadFactory)
StandardThreadExecutor(int coreThreads, int maxThreads, long keepAliveTime, TimeUnit unit, int queueCapacity, ThreadFactory threadFactory, RejectedExecutionHandler handler)

Method Summary

Modifier and Type	Method and Description
protected void	afterExecute(Runnable r, Throwable t)
void	execute(Runnable command)
int	getMaxSubmittedTaskCount()
int	getSubmittedTasksCount()

Methods inherited from class java.util.concurrent.ThreadPoolExecutor

allowCoreThreadTimeOut, allowsCoreThreadTimeOut, awaitTermination, beforeExecute, finalize, getActiveCount, getCompletedTaskCount, getCorePoolSize, getKeepAliveTime, getLargestPoolSize, getMaximumPoolSize, getPoolSize, getQueue, getRejectedExecutionHandler, getTaskCount, getThreadFactory, isShutdown, isTerminated, isTerminating, prestartAllCoreThreads, prestartCoreThread, purge, remove, setCorePoolSize, setKeepAliveTime, setMaximumPoolSize, setRejectedExecutionHandler, setThreadFactory, shutdown, shutdownNow, terminated, toString

Methods inherited from class java.util.concurrent.AbstractExecutorService

invokeAll, invokeAll, invokeAny, invokeAny, newTaskFor, newTaskFor, submit, submit, submit

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

DEFAULT_MIN_THREADS

public static final int DEFAULT_MIN_THREADS

See Also:

Constant Field Values

DEFAULT_MAX_THREADS

public static final int DEFAULT_MAX_THREADS

See Also:

Constant Field Values

DEFAULT_MAX_IDLE_TIME

public static final int DEFAULT_MAX_IDLE_TIME

See Also:

Constant Field Values

submittedTasksCount

protected AtomicInteger submittedTasksCount

Constructor Detail

StandardThreadExecutor

public StandardThreadExecutor()

StandardThreadExecutor

public StandardThreadExecutor(int coreThread,
                              int maxThreads)

StandardThreadExecutor

public StandardThreadExecutor(int coreThread,
                              int maxThreads,
                              long keepAliveTime,
                              TimeUnit unit)

StandardThreadExecutor

public StandardThreadExecutor(int coreThreads,
                              int maxThreads,
                              int queueCapacity)

StandardThreadExecutor

public StandardThreadExecutor(int coreThreads,
                              int maxThreads,
                              int queueCapacity,
                              ThreadFactory threadFactory)

StandardThreadExecutor

public StandardThreadExecutor(int coreThreads,
                              int maxThreads,
                              long keepAliveTime,
                              TimeUnit unit,
                              int queueCapacity)

StandardThreadExecutor

public StandardThreadExecutor(int coreThreads,
                              int maxThreads,
                              long keepAliveTime,
                              TimeUnit unit,
                              int queueCapacity,
                              ThreadFactory threadFactory)

StandardThreadExecutor

public StandardThreadExecutor(int coreThreads,
                              int maxThreads,
                              long keepAliveTime,
                              TimeUnit unit,
                              int queueCapacity,
                              ThreadFactory threadFactory,
                              RejectedExecutionHandler handler)

Method Detail

execute

public void execute(Runnable command)

Specified by:

execute in interface Executor

Overrides:

execute in class ThreadPoolExecutor

getSubmittedTasksCount

public int getSubmittedTasksCount()

getMaxSubmittedTaskCount

public int getMaxSubmittedTaskCount()

afterExecute

protected void afterExecute(Runnable r,
                            Throwable t)

Overrides:

afterExecute in class ThreadPoolExecutor